Scipy Function as Node (sverchok addon)
Here is an example of simple Sverchok usage, allowing you to interpolate between the two csv files.

use the value slider on the LERP node to Linearly Interpolate between the lists of coordinates. Feel free to ask questions about this, but I don't think this requires SNLite unless you really want to use code.
If you really want to use code you need to explain what you want to achieve with the two csv files, how they are to be interpolated. You have a nice simple example which you should be able to experiment with outside of Sverchok, from the Blender Text Editor.
set up your points, point and values as numpy arrays, and ignore SNLite until you can make it work purely from the TextEditor evaluation/execution. Once you know what python to write, converting the script to something that can be loaded into SNLite is trivial.